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Plasticity in Oviposition Site Selection Behavior in Drosophila suzukii (Diptera: Drosophilidae) in Relation to Adult Density and Host Distribution and Quality
Journal of Economic Entomology ( IF 2.2 ) Pub Date : 2021-05-12 , DOI: 10.1093/jee/toab108
Johanna E Elsensohn 1 , Coby Schal 1 , Hannah J Burrack 1
Affiliation  

Flexibility in oviposition site selection under temporally shifting environmental conditions is an important trait that allows many polyphagous insects to flourish. Population density has been shown to affect egg-laying and offspring fitness throughout the animal kingdom. The effects of population density in insects have been suggested to be mutualistic at low densities, whereas intraspecific competition is exhibited at high densities. Here, we explore the effects of adult crowding and spatial resource variation on oviposition rate in the invasive pest Drosophila suzukii (Matsumura). In a series of laboratory experiments, we varied the density of adult males and females while holding oviposition substrate availability constant and measured per female oviposition rate using high and low-quality substrates. We found that oviposition behavior was affected more by substrate than adult density, though both variables had significant effects. When we varied the spatial arrangement of whole raspberries, we observed differences in oviposition rate and egg distribution between the grouped and solitary female treatments. Our results suggest that social interactions encourage oviposition, especially when exposed to unfamiliar or unnatural substrates. These results highlight the compensating effect of increased oviposition rate per female as adult populations decline. They will help researchers and crop managers better understand in-field population dynamics throughout the season as population densities change.

中文翻译:

铃木果蝇(双翅目:果蝇科)产卵位点选择行为的可塑性与成虫密度、宿主分布和质量的关系

随时间变化的环境条件下产卵位点选择的灵活性是允许许多多食性昆虫繁衍的重要特征。人口密度已被证明会影响整个动物王国的产卵和后代健康。昆虫种群密度的影响被认为在低密度时是互惠的,而在高密度时表现出种内竞争。在这里,我们探讨了成虫拥挤和空间资源变化对入侵性害虫铃木果蝇(Matsumura)产卵率的影响。在一系列实验室实验中,我们改变了成年雄性和雌性的密度,同时保持产卵基质可用性恒定,并使用高质量和低质量基质测量每个雌性的产卵率。我们发现产卵行为受基质的影响比成人密度更大,尽管这两个变量都有显着影响。当我们改变整个覆盆子的空间排列时,我们观察到分组和单独雌性处理之间产卵率和卵子分布的差异。我们的研究结果表明,社交互动会促进产卵,尤其是在接触不熟悉或不自然的基质时。这些结果强调了随着成年人口的减少,每名女性的产卵率增加的补偿作用。随着人口密度的变化,它们将帮助研究人员和作物管理者更好地了解整个季节的田间人口动态。我们观察到分组和单独雌性治疗之间产卵率和卵子分布的差异。我们的研究结果表明,社交互动会促进产卵,尤其是在接触不熟悉或不自然的基质时。这些结果强调了随着成年人口的减少,每名女性的产卵率增加的补偿作用。随着人口密度的变化,它们将帮助研究人员和作物管理者更好地了解整个季节的田间人口动态。我们观察到分组和单独雌性治疗之间产卵率和卵子分布的差异。我们的研究结果表明,社交互动会促进产卵,尤其是在接触不熟悉或不自然的基质时。这些结果强调了随着成年人口的减少,每名女性的产卵率增加的补偿作用。随着人口密度的变化,它们将帮助研究人员和作物管理者更好地了解整个季节的田间人口动态。这些结果强调了随着成年人口的减少,每名女性的产卵率增加的补偿作用。随着人口密度的变化,它们将帮助研究人员和作物管理者更好地了解整个季节的田间人口动态。这些结果强调了随着成年人口的减少,每名女性的产卵率增加的补偿作用。随着人口密度的变化,它们将帮助研究人员和作物管理者更好地了解整个季节的田间人口动态。
更新日期:2021-05-12
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